package com.zdzx.utils;

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.io.InputStream;

import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletResponse;

public class ImageUtil {
	/**
     * @param srcImgPath 源图片路径
     * @param tarImgPath 保存的图片路径
     * @param waterMarkContent 水印内容
     * @param markContentColor 水印颜色
     * @param font 水印字体
     */
    public static void addWaterMark(InputStream srcImgPath, String waterMarkContent,Color markContentColor,Font font,int x,int y,HttpServletResponse response) {

        try {
            // 读取原图片信息
          //  File srcImgFile = new File(srcImgPath);//得到文件
            Image srcImg = ImageIO.read (srcImgPath);//文件转化为图片
            int srcImgWidth = srcImg.getWidth(null);//获取图片的宽
            int srcImgHeight = srcImg.getHeight(null);//获取图片的高
            // 加水印
            BufferedImage bufImg = new BufferedImage(srcImgWidth, srcImgHeight, BufferedImage.TYPE_INT_RGB);
            Graphics2D g = bufImg.createGraphics();
            g.drawImage(srcImg, 0, 0, srcImgWidth, srcImgHeight, null);
            g.setColor(markContentColor); //根据图片的背景设置水印颜色
            g.setFont(font);              //设置字体

            //设置水印的坐标
           // int x = srcImgWidth - 2*getWatermarkLength(waterMarkContent, g);  
           // int y = srcImgHeight - 2*getWatermarkLength(waterMarkContent, g);  
            g.drawString(waterMarkContent, x, y);  //画出水印
            g.dispose();  
            // 输出图片  
            //FileOutputStream outImgStream = new FileOutputStream(tarImgPath);  
            ImageIO.write(bufImg, "jpg", response.getOutputStream());
           
            //outImgStream.flush();  
            //outImgStream.close();  

        } catch (Exception e) {
            // TODO: handle exception
        }
    }
    public int getWatermarkLength(String waterMarkContent, Graphics2D g) {  
        return g.getFontMetrics(g.getFont()).charsWidth(waterMarkContent.toCharArray(), 0, waterMarkContent.length());  
    }  
    public static void main(String[] args) {
     //   Font font = new Font("微软雅黑", Font.PLAIN, 50);                     //水印字体
     //   String srcImgPath="d:/222.jpg"; //源图片地址
     //   String tarImgPath="D:/111.jpg"; //待存储的地址
     //   String waterMarkContent="图片来源：http://blog.csdn.net/zjq_1314520";  //水印内容
     //   Color color=new Color(0,0,0);                               //水印图片色彩以及透明度
  //     ImageUtil.addWaterMark(srcImgPath, tarImgPath, waterMarkContent,color, font);

    }
}
